In this study, hybrid aluminum/ alumina/ boron carbide composites were produced by accumulative roll bonding process. Boron carbide was added to matrix in the form of powder, but the alumina was introduced to matrix using anodizing process of alumina layer. In order to finding the optimal amount of reinforcement particles, and amount of reduction in the thickness of layers in rolling process, peeling test was performed. Welding efficiency values of peeling test for different samples were calculated and among them the best samples which were produced with optimal conditions were determined. The microstructure of produced composite with optimal conditions was investigated using optical and scanning electron microscope. Hardness, uniaxial tensile and shear punch tests were performed to evaluate the mechanical properties of composites. Fracture surfaces of the specimens after tensile test were investigated using scanning electron microscope. The results revealed that when the number of rolling cycles increased, the distribution of reinforcement particles in matrix and interfaces between particles and matrix were optimized and porosities decreased. The results of mechanical tests showed that increase in reinforcement amount and number of rolling cycles result in enhancement of hardness, tensile and shear strength. Additionally, it was shown that alterations of mechanical properties are consistent with microstructure changes. Finally, investigation of fracture surfaces revealed that the type of fracture is ductile with formation of shear porosities. Keywords: hybrid aluminum/ alumina/ boron carbide composite, accumulative roll bonding process, peeling test, microstructure, tensile strength, shear punch test, fracture surfaces